Gumming machine



June 8 1926. 1,587,638

M. FEYBUscH ET AL GUMMING MACHINE Filed Sept. 19, 1922 2 Sheets-Sheet 1June 8 1926.

M. FEYBUSCH ET AL GUMMING MACHINE Filed Sept. 19, 1922 2 Sheets-Sheet 2A TTRNE YS Patented June 8, 1926.

l.UNITED STATES ZPATENT orrlca.v

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GUMIING MACHINE.

Application led September 19, 1922. Serial lo. 589,078.

The present invention relates to machines for applyin a coating ofadhesive to sheets of paper, l: els and the like.

Heretofore it has been found extremely 5 diflicult to apply suchcoatings in a uniform manner and to prevent the machine from becomingsoiled and even rendered temporarily inoperative by an excess ofadhesive,

particularly as the machines have to be stopped from time to time in thenormal course of operation, and at suchtimesthe adhesive is liable toharden, necessitating a laborious cleaning of the incrusted parts beforethe machine is again ready for work. The'object of our present inventionis to avoid the defects` mentioned, and to secure an even distributionof the adhesive on the labels or other material, as well as to providemeans for readily keepin the machine in working condition. In t eparticular examples of our invention illustrated by the accompanyingdrawings, the gumming device is shown in connection with a pick-off.

or stripping appliance which operates to remove the coated labels orthelike from a roll which serves to convey the adhesive to the saidlabels. The invention also relates to certain features of this strippingappliance, and to various arrangements the construction, objects andadvantages of which will appear fully from the description followinghereinafter, and the `novelty will be pointe out in the appended claims.

Referring now to the accompanying-drawings, in which we have shown seversatisfactory embodiments of our invention,

Fig. 1 is a vertical longitudinal Section through one form of ourdevice; Fig. 2 is a artial plan view thereof; Fig. 3 is a detall View ofthe pick-off mechanism; Fig. 4 is a fragmentary view illustratinganother form of our invention; Figs. 5 and 6` are views corresponding toFigs. 1 and 2 but showing still another form of our invention; and Fig.7 is a section on line 7-7 of ertain parts have been indicated onlydiagrammatically, since they form no part of the present invention butare illustrated in detail and claimed in a separate ap lication filed byus o n September 19, 1922, erial No. 589,079.

The device illustrated in Figs. 1 to 3 comprises two superimposed rolls10, 11, the lowhesive. A` uide 16 may serve to ro rl 65 guide the l iclor sheet 15 into contldctpvitli the roll 11.

The glue-applying roll 11 is providedin its cylindrical surface with anumber of preferably evenly spaced circumferential grooves 17 into whichextend, referably at' the uppermost point of the ro the pointed ends oftake-off or stripper lingers 18 which serve to separate the label orsheet 15 from the roll 11. The lingers 18 may be provided 75 with curvedguiding portions 19 serving to guide the label orA sheet 15, after itlhas been separated from the roll 11, over' a roller 20, which latter maybe for instance part of the device for applying the gummed label to aroundcan, as described -in our application above referred to, or it maybe part of a conveyor mechanism for talng the ed sheet or label away, asdisclosed for instance in U. S. Letters Patent 1,355,219.

The lingers 18 are carried by a rod 21 su ported in brackets 22 and heldthereon gy means of nuts 23, the fingers being suitably spaced b spacingsleeves 24. At their rear ends, the gers 18 are provided with notches 25through which extends a rod 26 the ends of which are also secured to thebrackets 22. The rod 21 extends thro h 'the' brackets 22 with a certainamount o 1oose ness which permits a slight adjustment of the fingers,either lengthwise or up-anddown, t e notches 25 allowing suchadjustment. The brackets 22 are secured to a rod 27 held in open slots28 of the machine frame 29` by the conical ends of set screws 30, thisarrangement permitting an easywithdrawal of the rod 27 brackets 22 andstripping members 18. Through the brackets 22 are screwed, at a suitabledistance fromy the rod 27, screws 31 bearing with their lower endsagainst a stationary rod 32; turning of the screws v31 will swingthestructure comprising the brackets 22 and fingers 18 about the rod 27as a pivot, thus providila ready up-and-down adjustment of the gers 18with respect to the gumming roll-11. Locknuts 33 prevent accidentalturning of the screws 31. It will be noted that the lengthwiseadjustment of the brackets 22 is tangential to the roller 11 and permitsthe space between the guiding suraces 19 and the roller 20 to be varledzwhile the up-anddown adjustment of sald brackets is .radlal with respectto the roller 11 and permlts the fingers 18 to be adjusted relatlvely tothe grooves 17. Furthermore by loosening the nut. 23 any one of thefingers 18 may be adjusted, inde endently of the others, while avariation o the setting of the screws 31 will result in a simultaneousand similar adjustment of all of the lingers 18 with respect to thegrooves 17.

' While the glue-applying roll 11 1s supported directly in bearings ofthe frame 29, the glue-receiving and distributing roll 10 is supportedin bearing arms 34 fulcrumed on said frame at 35. The arms 34 arepressed upwardly by springs 36 engaging plungers 37 bearing agamst thelower ends of set screws 38 screwed into the arms 34. 'lhe pressurebetweemthe two rolls 10, 11 may be varied, to regulate the thlckness ofthe film of adhesive transmitted from the roll 10 to the roll 11, byturning the screws 38, locknuts 39 preventing accidental turnglo preventthe glue distributed o n the roll 11 by the roll 10 from filling thegrooves 17 and accumulating on and around the pick-off members 18, wehave provided rings 40, one for each groove 17 whlch rings are mountedloosely on the lower gumming roll 10 and enter the grooves 17 at thepoint of contact or nearest approach of the two rolls The glue will thusnot be communicated to the upper roll 11 at the grooves, the latterremaining practically free from glue. The fingers or take-ofi` members18 are preferably out of contact with the side walls of the grooves 17;this will prevent glue from the cylindrical surface of the roll 10 frombeing communicated to, and hardening on, the iingers 18.

Generally, the rolls 10, 11 are driven either by mutual surface contactor otherwise in such a manner as to give them the same peripheral speed.We do not wish, however, to limit ourselves to this particular relation.

The advantage of mounting the rings 40 loosely on the roll 10 is thatthey adjust themselves in the grooves 17, lengthwise of the roll 10;they need, however, not be loose, but might be rigid on said roll, 'orthey might even be integral therewith, as illustrated in Fig. 4.

In the forms of our invention described so far there will be narrowstrips of the sheet or label which will not receive any adhesive, viz,the portions of the sheet or label passing, during the gummingoperating, over the grooves 17. While this will generally not be adisadvantage, it might in some cases, for instance with very thin paper,be preferable to have the whole surface of the sheet provided with ulayer of adhesive. This may be accomplished for instance, in the mannerillustrated by Figs. 5 to 7.

Figs. 5 to 7 differ from Figs. 1 to 3 by showing the roll 11 providedwith inclined or oblique grooves 17 f instead of the straight grooves17. In the particular example shown, each Groove 17 lies in a transverseplane which 1s oblique or inclined with respect to the plane of rotationof the roll 11, so that each groove will form an ellipse. However, we donot desire to limit ourselves to these details.

To allow the take-off members 18 to move laterally as required by theoblique shape of the grooves 17 these members might be made flexible. Weprefer, however, to make this movement a positive one. This isaccomplished in the following manner: On the shaft of the roll 11 ismounted rigidly a sleeve 41 having a cam groove 42 in which travels aroller 43 secured to one end of a rocking lever 44 fulcrumed at 45 in asleeve 46 mounted rigidly on the rod 32. At its other end the lever 44has a fork 47 provided with oppositely-located projections or rollersl48 engaglng a groove 49 in a sleeve 50 rigidly secured to the rod 27which latter is movable axially in the bearings 28 of the frame 29, by arocking movement of the lever 44. Also rigid on the rod 27 are thesleevelike ends 22 of the brackets 22 carrying the take-oil1 members 18in the same manner as described in connection with Figs. l to 3. Therelative arrangement of the oblique grooves 17 and of the cam groove 42is such that when the roll 11 rotates the lever 44 will be rocked,causing the picking-olf ends of the members 18 to follow the path of thegrooves 17. The rings 40 in this case must be loose on the roll 10, soas to be able to fgllow freely the movement of the grooves 1 To insure acomplete gumming of the sheet or label, as referred to above, such sheetor label must be fed to the gumming roll 11 with a speed differing fromthat of such roll so that, as the sheet or label moves along in contactwith the roll, there will be a certain amount of slippage between them,resulting in a wiping action which, owing to the oblique arrangement ofthe grooves 17', will cover with adhesive the portions of the sheetwhich at first are left free of such adhesive. The sheet, label or otherarticle will thus be completely gummed on one side, without any ungummedstrips appearing thereon. In practice, the wiping action will generallybe obtainedA by causing the gumming roll 11 to rotate with'a greatersurface s eed than the feed rollers 13, 14, which may be accomplished inany convenient manner. The angle of inclination of the grooves can berelatively small, provided the wiping action is sufficient to cover thewhole width of the grooves.

Figs. 1 and 5 show the rings 40 hung c ccentrically on the-roll 10, sothat there W1ll be surface contact between said rings and the roll onlyat the upper portion of the roll; this facilitates the movement oradjustment of the rings longitudinally of the roll, and is of particularadvantage in the construction illustrated by Figs. 5, 6 and 7 Theprojections or rings 4() will not only clear the'grooves 17 or 17 of theupper roll 11 or 11 respectively of glue, but will also preventaccumulation of such glue on the clearing means; such accumulation is adrawback of 'stationary Scrapers employed hitherto in connection withgrooved rollers. Upon the stopping ofthe machine, the glue gathered onstationary Scrapers will harden, and interfere with the proper operationof the machine when-it is started again; the movable rings orprojections 40 employed by us will however constantly carry the glueaway from the point at which they engage the roll 11 or 11, thuspreventing accumulation. Another advantage of these movable rings orprojections is that they carry the surplus glue back to the glue pan orfountain 12.

We claim:

1. In a gumming device, a glue-supplying roll having circumferentialrings mounted thereon loosely, and a movable transfer member adapted toreceive glue from said roll and provided with grooves into which saidrings project.

2. In a gumming device, a glue-supplying roll having circumferentialrings mounted thereon loosely and eccentrically, and a movable transfermember adapted to receive glue from said roll and provided with groovesinto which said rings project.

3. A gumming device comprising a roll for applying an adhesive to anarticle fed thereto, said roll having circumferential grooves, strippingmembers entering said grooves to separate the gummed article from saidroll, said members being provided with curved surfaces for guiding thearticle away from said roll; and movable means entering said grooves toclear them of adhesive.

4. A gumming device comprising a roll for applying an adhesive to anarticle fed thereto, said roll having circumferential grooves, andstripping members entering said grooves for separating the gummedarticle from said roll, said members being provided with curved surfacesfor guiding said article in its passage from said roll and beingadjustable toward and from the center of said roll.

5. A gumming device comprising a roll for applying an adhesive to anarticle fed thereto, said roll having circumferential grooves, andstripping members entering said grooves for separating the gummedarticle from said roll, said members being provided with curved surfacesfor guiding said article in its passage from said roll and beingadjustable tangentially of said roll.

6. A gumming device comprising a roll for applying an adhesive to anarticle fed thereto, said roll having circumferential grooves, strippingmembers entering said grooves to separate said article from said roll,and rings also entering said grooves for removing any adhesive materialwhich may adhere tosaid grooves.

8. A cummingv device comprising a roll for applying adhesive tov anarticle fed thereto, said roll having circumferential' grooves,stripping members entering said grooves to separate said article fromvsaid roll, a second roll for distributing a film of` adhesive on saidfirst-named roll, said second-named roll having projections which alsoenter said grooves to remove therefrom any adhesive material which mayadhere thereto.

9. A gumming device comprising a roll for applying an adhesive to anarticle fed thereto, said roll having obliquely inclined circumferentialgrooves, and stripping members cooperating with said grooves forseparating the gummed article from said roll, said members being movablymounted to permit them to follow the inclination of said grooves.

10. A gumming device comprising a roll for applying an adhesive to anarticle fed thereto, said roll having obliquely inclined circumferentialgrooves, stripping members cooperating with lsaid grooves for se'arating the gummed article from said rol and means for causing saidstripping members a bodily movement lengthwise of said rollcorresponding to the shape of the grooves.

12. A gumming device comprising a roll i for applying an adhesive to anarticle fed said roll to separate said article from the roll, andclearing rings entering said grooves and rotatable about an axisexternal to said roll.

14. A guniining device comprising a circuinferentially grooved roll forapplying an adhesive to the article to be gummed, stripping membersentering the grooves of said roll to separate said article from theroll, another roll for supplying an adhesive to the lirst-nained roll,and clearing means mounted on said supply roll for rotation relativelythereto and entering said grooves at a distance from the strippermembers.

15. A guiiiming device comprising a cireumferentially grooved roll forapplying an adhesive to the article to le gumme stripping membersentering the grooves of said roll to separate said article from theroll, another roll for supplying an adhesive to the first-named roll, aglue pali into which said second roll dips, and clearing rings mountedon said supply roll and likewise dipping into said pan, said ringsrotating relatively to the first-named roll and entering the groovesthereof at a distance from the stripper members.

16. A gumming device comprising a cirouinferentially grooved roll forapplying an adhesive tothe article to be gummed, stripping membersentering the grooves of said roll to separate said article from theroll, another roll for supplying an adhesive to the first-named i'oll, aglue pan into which Said second roll dips, and clearing rings mounted onsaid supply roll loosely and eccentrically and likewise dipping intosaid pan, said rings rotating relatively to the first-named roll andentering the grooves thereof at a distance from the stripper members.

17. A gumining device comprising a roll foiapplying an adhesive to anarticle fed thereto, said roll being provided with a plurality ofcircumferential grooves, a plurality of stripping members entering saidgrooves for separating the gummed article from said roll, means forpermitting adj ustnient ot' any one of said members independently of theothers relatively to said roll, and means to adjust said memberssimililltaneously in unison relatively to said ro ln testimony whereofwe have signed this specification.

MARTIN FEYBUSCH. PAUL W. FLEISCHER.

